Ventilating-fan.



Patented Mar. 27, I900.

H. KLEIN. VENTILATING FAN.

(Application filed July 18, 1899.) (No Model.) 2 Sheets$heat I.

ZUz Z nass-es m: "bums P zrzns co.v wnc'ro-urno. WASHINGTON, n. c.

No. 646,002. Patented Mar. 27, I900.

H. KLEIN. I

VENTILATING FAN. (Application filed. July 18, 1899.)

2 Sheets-Sheet 2.

(No Model.)

W1??? as 5'65 I 6 PEYERS 00.. PNOTO-LlTND-.WASNKNGTON n c I NITED STATESPATENT OFFICE.

HEINRICH KLEIN, OF PIRMASENS, GERMANY.

VENTILATING-FAN.

SPECIFICATION forfnifig' part of Letters Patent No. 646,002, dated March27, 1900.

Application filed July 18, 1899.

To all z'v/"wm it may concern.-

Be it known that I, HEINRICH KLEIN, manufacturer of machines, residingat Pirmasens, Kingdom of Bavaria,Germany, have invented a new and usefulVentilating Apparatus, of which I give the following description.

My invention relates to a ventilating apparatus for the continuousventilation of one or several rooms which may be situated in any waywith regard to the apparatus.

The objects of myinvention are, first, aventilator having four vanessecured to its shaft by ribs which rotate in a ventilator-drum; second,aventilator-drum which on its circu mference has a number ofequally-distributed apertures for the escape of the air and which duringthe time the ventilator is rotating also rotates, which rotations withincertain intervals can be changed from right to left, and vice versa, bymeans of one of the usual reversing-gears, and, third, a number of fansresembling Venetian blinds and movable on vertical pivots, which placedalong the two longer sides of the ventilator-drum rectangularly to theventilator-shaft by a special mechanism are put in slow oscillatorymotion, whereby they gradually change their rectangular position into anacute-angular position to the left (or to the right, as the case may be)with regard to the ventilator-shaft, and having on their way back passedagain through the rectangular position with regard to theventilator-shaft they gradually take an acute-angular position to theright (or to the left, as the case may be) with regard to theventilatorshaft, and so on. By the oscillatory motion of these fans theair which is forced out of the apertures of the ventilator-drum by thefast-rotating ventilator escapes not only out of these apertures in astraight linei. (2., in

a direction rectangular to the ventilatorshaft-but also to the left orright of this direction, according to the position the fans just happento have.

Figure 1 represents a front view of the ventilating apparatus. Fig. 2represents a section in the direction A B of Fig. 1. Fig. 3 representsthe ground plan of the ventilating apparatus.

The same letters denote the same parts.

The bearings of shaft A are secured to the wooden posts 0 C of a work ordrying room Serial in 724,308. (No model.)

at a suitable distance from the floor. If the room be very large, two ormore ventilating apparatus may be put in the same. D and D are fixed andloose pulleys for the impulsion of shaft A. The former can alternatelybe put in rotation to the right or left by one of those gears commonlyused for this purpose. Secured to shaft A, by the side of the loosepulley, is the little pulley E, which by means of pulley F drives shaftG, which is near the fioorandparallel to shaft A. Secured to shaft G isanother little pulley H, which, by means of a belt or the like, makesrotate the drum in the closed boxes I I, the rim of the drum serving aspulley.

Drum B has been cut open four times in its entire length, so as toobtain several apertures,,through which the air in the drum is forcedout of the same by the fast-rotating fan, the air which has beenexpelled being replaced by air from without,which enters in thedirection of the drumshaft.

If we now suppose the ventilating'appara tus to be at work, theventilator and the drum rotating at the same time, but with differentvelocities-the former very fast the latter very slowlywe will easilyunderstand that the air which is expelled through the apertures B 13stirs up and makes Violently vibrate and undulate the surrounding air;but only the stratum of air opposite to the longer side of theventilating apparatus-i. 6., a stratum of air as wide as the drum iswide* would be stirred up and the space beyond the width of the drumwould entirely be excluded from any current of air if there were not theabove-mentioned Venetian-blind-like fans, the motion and effect of whichhave been described, sub. 3. A number of these metallic crescent-shapedfans 7c and 7a 70 are arranged on the two longer sides of the drum, asshown in the figures subjoined to this, each of these fans being movableon a vertical pivot L or L, which is fastened to rail M or M, supportedby posts N N. The fans on one side of the drum are on their backconnected with one another by rods 0 and O in the same man nor as theslats of Venetian blinds are connected with one another. By a specialarrangement all the fans on both sides of the drum are put in slowoscillatory motion, the mechanism of this arrangement being as follows:Secured to one end of the rods 0 and O are the cords P and P, which bymeans of crank S, driven by worm Q and worm-wheel R, are alternatelypulled to one side, the other end of the rods 0 and 0 being secured tothe cords P and P respectively, which are led over pulleys U U andprovided with counterpoises T T. By the weight of the latter the fansare slowly pulled to the other side dur ing the upstroke of the crank,and so on. The cords P and P, which always are taut,.because of thecounterpoises 'l and 'l", are led to the rods 0 and 0 over pulleys V Vand V V which are secured to the supports W, X, and X. If we now supposeshaft A to make five hundred and twelve revolutions per minute and theratio ofgearing of the pulleys E and F to be one to eight, shaft G wouldmake sixty-four revolutions per minute, and

if we suppose the ratio of pulley H to the diameter of the drum to beone to ten the drum would only make 6.4 revolutions per minute. Theratio of gearing, as well as the velocity with which theVenetian-blind-like fans move to and fro,may of course without anydifliculty be changed in such a manner as to yield the best resultspossiblein every case in question.

I know very well that before my invention ventilating apparatus for thepurpose above mentioned have been constructed in which the drum, whichwas provided with an aperture for the ingress and egress of the air, wasput in oscillatory motion in order to sweep a certain surface; but IWhat I claim as new, and desire to secure by Letters Patent, is-

l. A ventilator rotating with great velocity in a slowly-rotatin g drumwhich on its circu mference has a number of equally-distributed,slit-shaped apertures for the escape of the air, the air which has beenexpelled being replaced by air from without which enters in thedirection of the drum-shaft, substantially as described.

2. Anumber of crescent-shaped fan-blades, resembling Venetian blinds,movable on vertical pivots and placed along the two longer sides of thedrum and means to put them in oscillatorymotionbytransmission-geardriven by the ventilator-shaft, substantiallyas described.

In witness whereof I have hereunto set my hand in presence of twowitnesses.

HEINRICH KLEIN.

lVitnesscs:

J. ADRIAN, R. PrsoLL.

